Instrument for measuring pressures and forces



April 1a 192s.- K, v1,580,568

' J. G. PAULIN i xus'rnunur ro'n naAsunxue rnsssunss um ronca.:

Fned nay 15,' i922 which theA tension of the sprin may be regu.-

irectly vor in Patented Apr., l, 1926.

unirse srATas Laaste .PATENT carica.

JOSUA GABRIEL PAULIN, OF STOCKHOLM, SWEDEN.

INSTRUMENT FOB ME'ASURING PRESSURES ANI) FORCES.

Application led May 13,

To aZZ whom t 'may concern.'

Be it known that- I, JosUA GABRIEL PAULI'N, a subject of the King ofSweden, and resident of 31 Hollandaregatan,

Stockholm; Sweden, have invented certain new and useful Improvements inInstruments for Measuring Pressures" and'. Forces,

movable organ being connected with an angular-bent strap or stringconnected with the stand of the instrument and by a second strap orstring running from the knee of the first-named strap or string to aspringactuated shaft with which is connected an index.

The invention is illustrated in the annexed drawings, in which Fig. 1shows a galvanometer, amperemeter, or voltmeter on the electromagneticprinciple. Figs. 2 and 3 show a-barometer.

ln Fig. 1, an electric current to be measured passes through a solenoidor electromagnet l. An armature 2 is xed to a lever 3 fulcrumedat thepoint 4. On the end of the lever 3 ac ts a spring 5', the other end ofwhich is fastened to the nut 6 guided by the pins 7 and acted upon by ascrew 8, by

lated. This vtension can bedirectly read n the scale 9. s

The movements of the armature may# be observed by means ot an arm -orindex direct to the lever 3 and moving over a scale, which may,.forinstance, be provided with a zero-point in its center. The reading isobtained by bracing or slackening the spring by means of the screw 8until the index points to zero. The tension of the spring, as read onthe scale 9, is a measure of the intensity of the current passingthrough the solenoid 1.

It is, however, important that the transmission of the movement of themovable member to an index bebrought about in the simplest andmostrictionless wa According to the present invention' t .is may be donein the following manner: From a point irmly'connected with the saidmovable member to a point immovably cnnected with the xed stand ofthejinstruinent there 1922. Serial No. 560,849.

is stretched a flexible band, strap, or string, from' the-middle ofwhich is stretched another bander string, the other'end of which isfastened to a point iirmly connected.

with the shaft o f the index, thefirst-named band or string being thusbei-it inV its 'middle in'toja knee, preferablyin theflorm of an obtuseangle.,

' In Fig..1 an arrangement fis shown for indicating thef'movements` ofthe armature Vof fa"4 galvanometer.

An` arm 10 is firmly connected with the armature-2. The pillar 11 isixed to the base-platev of the instrument. From the point 13 on the armlto the point12 on the pillar 1l" is stretcheda flexible band or string14:. From the middle ofthisband orA string is stretched another band orstring 15, whose otherv end is fastened to the point 17 .on the indexshaft 16.

A second system of bands or strings may,

of course, be arranged in, symmetry with the former oneras shown in thefigure. This latter system tends to turn' the index shaft 4in thesamedirection as the former systeml under the action of the movements of thearmature. The bands or strings are being bands or strings applied, in aknown manner.

It is, however, preferable to suspend the index shaft in the mannerdescribed below with reference to Figs. 2 and 3.

The mode of operation of the instrument right. By means of the screw Sthe spring 5 is stretched until the index points to zelo. 'If properlygraduated, the scale can indicate the strength or tension of thecurrent.

Figs. 2 and 3 illustrate the application ofthe invention on thevconstruction of a barometer. The instrument is placed on a base-plate19. 20 is an ordinary'evacuated diaphragm (membrane) box, 21 a clampscrewed on to the upper side of the box 20 and to the disc. 22. The.coil 23 is fastened to the disc '22 and to the screw-threaded ring 24,which has two projecting arms 25 provided at their ends with aperturesfitting tocylindrical rods 26 actin as guides, when the ring 24 is beingraise or lowered. A nut 27 for the threadedring 24 is fixed to the disc28, which is'supported by a ring clamp i ,dez and movii cve?? ihre scaic1f manas c n pair o' sso; me@ acicw L22, which la* 'oii Si by 'means ofThe disc 28 may be provided 'with c, in miiiimecefs of mercuy. A m my bfuse as incx 011 the i The fzoovev described mcd@ suspending the ind 2;shaft 'su two Qoii-sp'fins? insteaci of journaling it i cnc 'Knownmanne?? may aise be appiicf 'to iiisisiimicmsa which are :cojaconstructed on @im izeic-measiu I iincipiey buf@ in which im indica@ c7''ic movements ci' mcfvable member shows thc rassure, the intensi@ciiffi'cn, ctc., dizecJ en a.

Havin' now desc'ibec. imVcifiior;g what daim as new mi ccsirc secure 'by.Letters ent is Pia mcmbef and.

icm-35, a kuechen-c 3 one enc?. nim/anic mcmbcf w 'me frame ci; ne ibe?? Lc the sai pum-csc svi indcgg mmbic io 9 comme' coimtefaci' 'moansasscciaic@ lc'tai5riin L- in@ calc, mces'., amusmoic, mici spring meanszec mitii@ q movements of *dic die imei inscmmcng foi; measuring fini".vici-,suics ccmpi'ising am incl vying in@ imci, a diap'iu'a pcs/e6, toh@ inici icssiiic5 sgui'ing means '-cimcctc. Wi'l; said iaphizigm dcviccu f" @imfucmc'ng the mici pzcssmcj adgus" 'wi'ii 'Erie spring; means r'ipi1i'agm lita. 2cm poni icn, fi '.icxibfle member having; "me one am?.iicrco :iixc i@ the mmabic member mici, 'die oie ciu-l fix-cd "zo the'fr of ik@ insifumcn, L connection. exten@ :imm che ciiibie member "L0'iie ina Trying shaft for che. puiposc of transmit- *che movsmcnts thesaid. mova'be mcmnci io index sm have hereunto sc Witness wbcreoi i mynano-.

